import websocket
import datetime
import hashlib
import base64
import hmac
import json
from urllib.parse import urlencode
import time
import ssl
from wsgiref.handlers import format_date_time
from datetime import datetime
from time import mktime
import _thread as thread
import os
from config_message.Environment import APPID, APISecret, APIKey, SAVE_PATH
from time import time
from app.utils import pcm2wav
 
STATUS_FIRST_FRAME = 0  # 第一帧的标识
STATUS_CONTINUE_FRAME = 1  # 中间帧标识
STATUS_LAST_FRAME = 2  # 最后一帧的标识
 
 
class Ws_Param(object):
    # 初始化
    def __init__(self, APPID, APIKey, APISecret, Text):
        self.APPID = APPID
        self.APIKey = APIKey
        self.APISecret = APISecret
        self.Text = Text
 
        # 公共参数(common)
        self.CommonArgs = {"app_id": self.APPID}
        # 业务参数(business)，更多个性化参数可在官网查看
        self.BusinessArgs = {"aue": "raw", "auf": "audio/L16;rate=16000", "vcn": "xiaoyan", "tte": "utf8"}
        self.Data = {"status": 2, "text": str(base64.b64encode(self.Text.encode('utf-8')), "UTF8")}
        #使用小语种须使用以下方式，此处的unicode指的是 utf16小端的编码方式，即"UTF-16LE"”
        #self.Data = {"status": 2, "text": str(base64.b64encode(self.Text.encode('utf-16')), "UTF8")}
 
    # 生成url
    def create_url(self):
        url = 'wss://tts-api.xfyun.cn/v2/tts'
        # 生成RFC1123格式的时间戳
        now = datetime.now()
        date = format_date_time(mktime(now.timetuple()))
 
        # 拼接字符串
        signature_origin = "host: " + "ws-api.xfyun.cn" + "\n"
        signature_origin += "date: " + date + "\n"
        signature_origin += "GET " + "/v2/tts " + "HTTP/1.1"
        # 进行hmac-sha256进行加密
        signature_sha = hmac.new(self.APISecret.encode('utf-8'), signature_origin.encode('utf-8'),
                                 digestmod=hashlib.sha256).digest()
        signature_sha = base64.b64encode(signature_sha).decode(encoding='utf-8')
 
        authorization_origin = "api_key=\"%s\", algorithm=\"%s\", headers=\"%s\", signature=\"%s\"" % (
            self.APIKey, "hmac-sha256", "host date request-line", signature_sha)
        authorization = base64.b64encode(authorization_origin.encode('utf-8')).decode(encoding='utf-8')
        # 将请求的鉴权参数组合为字典
        v = {
            "authorization": authorization,
            "date": date,
            "host": "ws-api.xfyun.cn"
        }
        # 拼接鉴权参数，生成url
        url = url + '?' + urlencode(v)
        # print("date: ",date)
        # print("v: ",v)
        # 此处打印出建立连接时候的url,参考本demo的时候可取消上方打印的注释，比对相同参数时生成的url与自己代码生成的url是否一致
        # print('websocket url :', url)
        return url
 
def on_message(ws, message, time_str):
    try:
        message =json.loads(message)
        code = message["code"]
        sid = message["sid"]
        audio = message["data"]["audio"]
        audio = base64.b64decode(audio)
        status = message["data"]["status"]
        if status == 2:
            print("ws is closed")
            ws.close()
        if code != 0:
            errMsg = message["message"]
            print("sid:%s call error:%s code is:%s" % (sid, errMsg, code))
        else:
            with open(SAVE_PATH + f'pcm/{time_str}.pcm', 'ab') as f:
                f.write(audio)
    except Exception as e:
        print("receive msg,but parse exception:", e)
 
# 收到websocket错误的处理
def on_error(ws, error):
    print("### error:", error)
 
# 收到websocket关闭的处理
def on_close(ws):
    print("### closed ###")
 
 
# 收到websocket连接建立的处理
def on_open(ws, time_str):
    def run(*args):
        d = {"common": wsParam.CommonArgs,
             "business": wsParam.BusinessArgs,
             "data": wsParam.Data,
             }
        d = json.dumps(d)
        print("------>开始发送文本数据")
        ws.send(d)
        if os.path.exists(SAVE_PATH + f'pcm/{time_str}.pcm'):
            os.remove(SAVE_PATH + f'pcm/{time_str}.pcm')
 
    thread.start_new_thread(run, ())
 
def text2audio(text):
    try:
        global wsParam
        time_str = int(time())
        # 测试时候在此处正确填写相关信息即可运行
        wsParam = Ws_Param(APPID = APPID,
                        APISecret = APISecret,
                        APIKey = APIKey,
                        Text = text)
        websocket.enableTrace(False)
        wsUrl = wsParam.create_url()
        ws = websocket.WebSocketApp(wsUrl, 
                                    on_message = lambda x,y : [on_message(x, y, time_str)], 
                                    on_error = on_error, 
                                    on_close = on_close)
        ws.on_open = lambda x : [on_open(x, time_str)]
        ws.run_forever(sslopt = {"cert_reqs": ssl.CERT_NONE})
        pcm2wav.pcm2wav(time_str)
        return time_str
    except Exception:
        return False